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Finding the Fourth Proportional to 642,483.44, 886,628.76 and 356,001.20

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Solution

The fourth proportional to 642,483.44, 886,628.76 and 356,001.20 is: 491,282.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,483.44 : 886,628.76 = 356,001.20 : x
  2. Step 2: Convert to fraction form
    642,483.44/886,628.76 = 356,001.20/x
  3. Step 3: Cross multiply
    642,483.44x = 886,628.76 × 356,001.20
  4. Step 4: Simplify right side
    642,483.44x = 315,640,902,514.51
  5. Step 5: Solve for x
    x = 315,640,902,514.51/642,483.44
  6. Step 6: Final answer
    x = 491,282.55

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.